Section 4: Lining Specification
HB50HT
Marflex™ Bromobutyl – Superior temperature resistance to acids and caustic solutions up to 260°F (127°C). With tie gum.
FDA compliant.
Specifications
Durometer of Face Material:
Shore A Scale
Pressure Cure:
55 to 65
atmosPheric cure:
50 to 60
Available Gauges:
1/8”, 3/16”, 1/4”, 1/2”, 4mm, 5mm
6mm, and 12mm
Skive:
Closed
Repairs:
Repair with original lining or CHB50HT. See
Section 16 – Repair Procedures.
Typical Physical Properties
Tensile Strength PSI
ASTM D412
1200
% Elongation at break
ASTM D412
350
Durometer
ASTM D2240
55A
Specific Gravity
ASTM D927
1.35
Adhesion to Metal
ASTM D429
30 LBS
Notes: For the best appearance and chemical resistance of the completed rubber
lining, always apply plastic side down against the substrate.
Cure Methods and Times:
Autoclave
2 hours at 290°F (143°C)
8 hours at 260°F (127°C)
Internal Pressure
Atmospheric
For vacuum service:
Up to 1/4” thick: 30 hours at 260°F (127°C)
1/4” to 1/2” thick: 60 hours at 260°F (127°C)
Up to 1/4” 48 hours at 200°F (94°C)
Atmospheric curing not recommended for vacuum service.
Note: Cure times may require adjustment to compensate for heavy metal thickness,
low exterior temperatures or other unusual factors. See Section 14 – Curing
Instructions.
5020 Panther Parkway Seville, Ohio 44273
Ph. 800-321-5583 • Fx. 330-769-9334
BLAIR ENG 093 V6 REV. 1
www.blairrubber.com
HB50HT Marflex™ Bromobutyl – Superior temperature
resistance to acids and caustic solutions up to 260°F (127°C).
Storage Life From Date of
Shipment
32°F (0°C) to 50°F (10°C)
180 days
51°F (13°C) to 65°F (19°C)
90 days
66°F (21°C) to 75°F (23°C)
60 days
76°F (23°C) to 85°F (30°C)
30 days
Storage temperature must not exceed 85°F (30°C)
Adhesive System
Endurabond™ 1*2*3 SYSTEM
1st coat on metal:
Primer #1
2nd coat on metal:
Intermediate #2
3rd coat on metal:
Tack #3
On the rubber:
Tack #3
On the seams:
Tack 500
Applicator Notes
1.
Tacky Back Tie Gum is also available on special order. This option
eliminates the need to apply Tack #3 adhesive to the back of the
rubber lining. This reduces VOC exposure to your crew and shortens
application time.
2. The temperature of the substrate must be greater than 60°F (15°C)
prior to applying primer and rubber. Temperatures should not exceed
120°F (49°C).
3. For hot water cure, consult with Blair Rubber Company’s technical
department. When using this method, a qualified steel structural
design engineer must be consulted due to stresses placed on the
vessel.
4. For vacuum vessel curing instructions contact Blair Rubber Company’s
Technical Department.
5. A heated table that warms rubber to approximately 120°F (49°C) is
best for ease of application.
Disclaimer:
The above guidelines are based on general industry practices and not applicable to all installations. Please contact Blair Rubber Company for specific application
instructions. Application methods shall conform to Blair Rubber Company instructions contained in the Engineering & Applicator manual. Deviations from the
specifications must be approved in writing by Blair Rubber Company. Data values are approximate and may vary based on installation techniques and atmospheric
conditions. As such, data values should be used as general guidelines and are not a legally binding warranty of product characteristics. This document is copyright to
and the intellectual property of Blair Rubber Company and may not be copied or distributed without prior consent.
Blair Rubber Company Section 4: Lining Specification HB50HT
BLAIR ENG 093 V6 REV. 1
2